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124results about How to "Completely isolated" patented technology

Electrified on-line monitoring and protecting device for intelligent high-voltage vacuum circuit breaker

The invention discloses an electrified on-line monitoring and protecting device for an intelligent high-voltage vacuum circuit breaker. The electrified on-line monitoring and protecting device for the intelligent high-voltage vacuum circuit breaker comprises a hall current sensor, a differential transformer displacement transducer, a pressure sensor and a wireless temperature sensor, wherein a signal output end of the hall current sensor is connected with an A/D (Analog to Digital) converter I; a signal output end of the differential transformer displacement transducer is connected with an A/D converter II; a contact switch port is connected with an optoelectronic isolation module; a signal output end of the pressure sensor is connected with a vacuum degree monitor; and the A/D converter I, the A/D converter II, the optoelectronic isolation module and the vacuum degree monitor are respectively connected with a central processing unit; the central processing unit is connected with an RS485 communication module and a displayer; and the wireless temperature sensor is in wireless communication connection with a temperature collector in the central processing unit. The electrified on-line monitoring and protecting device for the intelligent high-voltage vacuum circuit breaker has strong antijamming capability, high monitoring accuracy, strong stability, and reliable safeguard procedures.
Owner:ANHUI LONGPO ELECTRICAL

Flame-retarding polystyrene heat insulation material and preparation method thereof

The invention discloses a flame-retarding polystyrene heat insulation material. The flame-retarding polystyrene heat insulation material is characterized by comprising, by weight, expandable polystyrene (EPS) foaming particles 80-90% and efficient fire retardant 10%-20%, wherein the efficient fire retardant comprises, by weight, magnesium hydrate fire retardant 3%-5%, superfine graphite 1%-6%, kaolin 1%-3%, pigment 1%-3% and water 3%. A preparation method of the flame-retarding polystyrene heat insulation material comprises the steps of (1) evenly mixing and stirring the magnesium hydrate fire retardant, the superfine graphite, the pigment and the water according to raw material proportioning; (2) evenly mixing and stirring prepared efficient fire retardant and EPS foaming particles and then air-drying a mixture at the normal temperature for 3-5 minutes to enable the efficient fire retardant to evenly wrap the EPS foaming particles; (3) placing the mixture, namely the efficient fire retardant evenly wrapping the EPS foaming particles into a model pressing machine to be pressed and formed and cutting the formed mixture into plates with any size. The flame-retarding polystyrene heat insulation material has the advantages of being simple in manufacture, light in mass, fireproof and good in heat-preserving effect.
Owner:BNSA NEW MATERIAL SHANGHAI CO LTD

Novel roller bit sealing ring

The invention discloses a novel roller bit sealing ring, which belongs to the field of bearing sealing. The novel roller bit sealing ring is disposed in a sealing groove between a bearing shaft hole and a tooth palm journal. Both ends of the sealing groove are respectively communicated with an inside lubricating oil channel and an outside drilling fluid channel. The novel roller bit sealing ring comprises a metal framework fixed in the sealing groove, the metal framework separates the sealing groove into a lubricating oil sealing groove communicated with the inside lubricating oil channel and a drilling fluid sealing groove communicated with the outside drilling fluid channel. A lubricating oil sealing part is disposed in the lubricating oil sealing groove and completely seals and separates the inside lubricating oil channel together with the metal framework. A drilling fluid sealing part is disposed in the drilling fluid sealing groove and completely seals and separates the outside drilling fluid channel together with the metal framework. The novel roller bit sealing ring is more suitable for severe environment of drilling work, and capable of more effectively and simultaneously separating lubricating oil and drilling fluid, rock debris and the like. Separation of lubricating oil and separation of drilling fluid do not affect each other, and service life of a sealing device is prolonged.
Owner:CHENGDU SHENGBANG SEALS

Pneumatic self-circulation animal cell culture bioreactor and application method thereof

The invention discloses a pneumatic self-circulation animal cell culture bioreactor and an application method thereof. The bioreactor is characterized by comprising a large tank, a small tank located in the large tank, a magnetic stirring system located at the bottom of the large tank, a heating system and a controlling system, wherein a sealing cover is arranged at the upper end of the large tank, jackets connected with the heating system are arranged on two sides of the large tank, and a highest liquid level sensor of the large tank is arranged at the upper part in the large tank; and a sealing head is arranged at the upper end of the small tank, an opening is formed in the lower end, the sealing head is fixedly connected in a sealing manner with the sealing cover through a breathing pipe, the upper end of the breathing pipe penetrates out of the sealing cover and is connected with a vacuum air pump and an air pressure pump respectively, the lower end penetrates out of the sealing head and enters the small tank, a cavity used for accommodating a cell carrier is defined by two up-and-down horizontal stainless steel wire mesh boards in the middle of the small tank and the inner wall of the small tank, an upper liquid level sensor of the small tank is arranged above the cavity, and a lower liquid level sensor of the small tank is arranged below the cavity. The pneumatic self-circulation animal cell culture bioreactor has the advantages of good air tightness, simplicity in operation, low contamination rate, good cell quality and high yield.
Owner:罗火生

High-voltage electrified body temperature monitoring system based on wireless transmission mode

The invention discloses a high-voltage electrified body temperature monitoring system based on a wireless transmission mode, belonging to the field of remote monitoring system. The high-voltage electrified body temperature monitoring system comprises a monitoring center, a transport network and a site plant; a monitoring device is directly installed on the monitoring point of detected high-voltage equipment and is equipotential to the detected equipment; the monitoring device and a data concentrator are communicated in the wireless mode, and the data concentrator is connected with the monitoring center via a wired transport network/ GPRS; the monitoring device adopts the design of lower energy consumption, and standby current is smaller than 2 mu A; batteries are adopted to supply power to the monitoring device; and the monitoring device adopts a wireless mode to send data, thus thoroughly solving the problem of high-voltage insulation, and realizing on-line monitoring of the high voltage equipment. The high-voltage electrified body temperature monitoring system gives an alarm in various modes, can find temperature rise of the high voltage equipment in time so as to take measures immediately, thus avoiding accidents and greatly improving the safety of power grid operation.
Owner:SHANDONG ZHIYANG ELECTRIC
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